Why does Instant dry yeast make Bread Rise? How does yeast works?

date : 2016-05-23 source : Click：5190Yeast is used in baking as a leavening agent, where it converts the fermentable sugars present in dough into the gas carbon dioxide. This causes the dough to expand or rise as gas forms pockets or bubbles. When the dough is baked, the bread yeast dies and the air pockets "set", giving the baked product a soft and spongy texture.